A group of researchers has initiated the preservation of Ukrainian cultural heritage digital archives. The information is available here: https://www.sucho.org/

The list of identified sites is available here: https://docs.google.com/spreadsheets/d/1Rf0sQ3OB7tirk1xKiaa52lzV9ZTCDkx7eiuK5EXj6l8/edit#gid=336731417

And the list of archived sites is here: https://docs.google.com/spreadsheets/d/1zcrfKnuyG2VOGLvhfxPLiwBlUtGbf8ZzObuJyWkZW9k/edit#gid=0

For the moment, there are a few sites concerning the theater in this listing.
However, if archivists, librarians, and researchers with knowledge of Ukrainian theater, specific archival collections, or any endangered data could join this group, it would be a great help.

No technical knowledge is necessary; a form allows to indicate the web addresses to be saved : https://docs.google.com/forms/d/e/1FAIpQLSffa64-l6qXqEumAcf38OEOrTFeYZEmF531PNv9ZgzNFbcgxQ/viewform

For those who have technical skills (or wish to learn, tutorials are available), it is possible to join the group on Slack. All information is available on the site.